Kidde-Fenwal 27021-1-325 SF 14/01 Depending on how the phones

Depending on how the phones are wired

Detector Bases

Number of Switches 1

Kidde brand intelligent life safety systems offer the power of advanced intelligent processing in configurations that deliver uncomplicated solutions for small to mid-sized applications

Duct point temperature sensor with a 10K ohm NTC Type II sensing element

Kidde-Fenwal 27021-1-325 SF 14/01 Depending on how the phonesDETECT A FIRE (D A F) thermal detectors are UL Listed and FM Approved detection and release devices for use with fire detection systems to activate alarms and extinguishing systems. This Rate Compensated device combines the best features of both fixed temperature and rate of rise detectors.